time capsule
noun
a receptacle containing documents or objects typical of the current period, placed in the earth or in a cornerstone for discovery in the future.
Origin of time capsule
First recorded in 1935–40
Words nearby time capsule
Example sentences from the Web for time capsule
It serves as a time-capsule: a conservative critique of the Obama presidency and the presentation of an alternative.
British Dictionary definitions for time capsule
time capsule
noun
a container holding articles, documents, etc, representative of the current age, buried in the earth or in the foundations of a new building for discovery in the future